||This article needs additional citations for verification. (February 2009)
UMC (Uniwersalna Maszyna Cyfrowa - Polish for Universal Digital Machine) is a family of computers produced by Elwro from 1962. It consisted of vacuum-tube based UMC-1 and transistor-based UMC-10. UMC computers in 1964 operated using negabinary (-2 base) numeral system invented by prof. Zdzisław Pawlak.
- ^ http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=AD0869038 The Universal UMC 10 Computer retrieved 2009 SEpt 23